qcanvaspolygon(3qt) [redhat man page]
QCanvasPolygon(3qt) QCanvasPolygon(3qt) NAME
QCanvasPolygon - Polygon on a QCanvas SYNOPSIS
#include <qcanvas.h> Inherits QCanvasPolygonalItem. Inherited by QCanvasSpline. Public Members QCanvasPolygon ( QCanvas * canvas ) ~QCanvasPolygon () void setPoints ( QPointArray pa ) QPointArray points () const virtual QPointArray areaPoints () const virtual int rtti () const Protected Members virtual void drawShape ( QPainter & p ) DESCRIPTION
The QCanvasPolygon class provides a polygon on a QCanvas. Paints a polygon with a QBrush. The polygon's points can be set in the constructor or set or changed later using setPoints(). Use points() to retrieve the points, or areaPoints() to retrieve the points relative to the canvas's origin. The polygon can be drawn on a painter with drawShape(). Like any other canvas item polygons can be moved with QCanvasItem::move() and QCanvasItem::moveBy(), or by setting coordinates with QCanvasItem::setX(), QCanvasItem::setY() and QCanvasItem::setZ(). Note: QCanvasPolygon does not use the pen. See also Graphics Classes and Image Processing Classes. MEMBER FUNCTION DOCUMENTATION
QCanvasPolygon::QCanvasPolygon ( QCanvas * canvas ) Constructs a point-less polygon on the canvas canvas. You should call setPoints() before using it further. QCanvasPolygon::~QCanvasPolygon () Destroys the polygon. QPointArray QCanvasPolygon::areaPoints () const [virtual] Returns the vertices of the polygon translated by the polygon's current x(), y() position, i.e. relative to the canvas's origin. See also setPoints() and points(). Reimplemented from QCanvasPolygonalItem. void QCanvasPolygon::drawShape ( QPainter & p ) [virtual protected] Draws the polygon using the painter p. Note that QCanvasPolygon does not support an outline (pen is always NoPen). Reimplemented from QCanvasPolygonalItem. QPointArray QCanvasPolygon::points () const Returns the vertices of the polygon, not translated by the position. See also setPoints() and areaPoints(). int QCanvasPolygon::rtti () const [virtual] Returns 4 (QCanvasItem::Rtti_Polygon). See also QCanvasItem::rtti(). Reimplemented from QCanvasPolygonalItem. Reimplemented in QCanvasSpline. void QCanvasPolygon::setPoints ( QPointArray pa ) Sets the points of the polygon to be pa. These points will have their x and y coordinates automatically translated by x(), y() as the polygon is moved. SEE ALSO
http://doc.trolltech.com/qcanvaspolygon.html http://www.trolltech.com/faq/tech.html COPYRIGHT
Copyright 1992-2001 Trolltech AS, http://www.trolltech.com. See the license file included in the distribution for a complete license statement. AUTHOR
Generated automatically from the source code. BUGS
If you find a bug in Qt, please report it as described in http://doc.trolltech.com/bughowto.html. Good bug reports help us to help you. Thank you. The definitive Qt documentation is provided in HTML format; it is located at $QTDIR/doc/html and can be read using Qt Assistant or with a web browser. This man page is provided as a convenience for those users who prefer man pages, although this format is not officially supported by Trolltech. If you find errors in this manual page, please report them to qt-bugs@trolltech.com. Please include the name of the manual page (qcanvaspolygon.3qt) and the Qt version (3.1.1). Trolltech AS 9 December 2002 QCanvasPolygon(3qt)
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QCanvasSpline(3qt) QCanvasSpline(3qt) NAME
QCanvasSpline - Multi-bezier splines on a QCanvas SYNOPSIS
#include <qcanvas.h> Inherits QCanvasPolygon. Public Members QCanvasSpline ( QCanvas * canvas ) ~QCanvasSpline () void setControlPoints ( QPointArray ctrl, bool close = TRUE ) QPointArray controlPoints () const bool closed () const virtual int rtti () const DESCRIPTION
The QCanvasSpline class provides multi-bezier splines on a QCanvas. A QCanvasSpline is a sequence of 4-point bezier curves joined together to make a curved shape. You set the control points of the spline with setControlPoints(). If the bezier is closed(), then the first control point will be re-used as the last control point. Therefore, a closed bezier must have a multiple of 3 control points and an open bezier must have one extra point. The beziers are not necessarily joined "smoothly". To ensure this, set control points appropriately (general reference texts about beziers will explain this in detail). Like any other canvas item splines can be moved with QCanvasItem::move() and QCanvasItem::moveBy(), or by setting coordinates with QCanvasItem::setX(), QCanvasItem::setY() and QCanvasItem::setZ(). See also Graphics Classes and Image Processing Classes. MEMBER FUNCTION DOCUMENTATION
QCanvasSpline::QCanvasSpline ( QCanvas * canvas ) Create a spline with no control points on the canvas canvas. See also setControlPoints(). QCanvasSpline::~QCanvasSpline () Destroy the spline. bool QCanvasSpline::closed () const Returns TRUE if the control points are a closed set; otherwise returns FALSE. QPointArray QCanvasSpline::controlPoints () const Returns the current set of control points. See also setControlPoints() and closed(). int QCanvasSpline::rtti () const [virtual] Returns 8 (QCanvasItem::Rtti_Spline). See also QCanvasItem::rtti(). Reimplemented from QCanvasPolygon. void QCanvasSpline::setControlPoints ( QPointArray ctrl, bool close = TRUE ) Set the spline control points to ctrl. If close is TRUE, then the first point in ctrl will be re-used as the last point, and the number of control points must be a multiple of 3. If close is FALSE, one additional control point is required, and the number of control points must be one of (4, 7, 10, 13, ...). If the number of control points doesn't meet the above conditions, the number of points will be truncated to the largest number of points that do meet the requirement. Example: canvas/canvas.cpp. SEE ALSO
http://doc.trolltech.com/qcanvasspline.html http://www.trolltech.com/faq/tech.html COPYRIGHT
Copyright 1992-2001 Trolltech AS, http://www.trolltech.com. See the license file included in the distribution for a complete license statement. AUTHOR
Generated automatically from the source code. BUGS
If you find a bug in Qt, please report it as described in http://doc.trolltech.com/bughowto.html. Good bug reports help us to help you. Thank you. The definitive Qt documentation is provided in HTML format; it is located at $QTDIR/doc/html and can be read using Qt Assistant or with a web browser. This man page is provided as a convenience for those users who prefer man pages, although this format is not officially supported by Trolltech. If you find errors in this manual page, please report them to qt-bugs@trolltech.com. Please include the name of the manual page (qcanvasspline.3qt) and the Qt version (3.1.1). Trolltech AS 9 December 2002 QCanvasSpline(3qt)